EU Custom Code Reform Advances on March 26: What Cross-Border Sellers Should Know
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The eCommerce shift you actually need to act on
Multi-channel fulfillment has a new playbook for success: Amazon MCF can now fulfill orders for Shein, Walmart and Shopify, turning fragmented fulfillment into one operational command. In fact, research shows improving promised delivery time measurably increases demand and repeat purchases — faster delivery is a direct growth lever.
So if you sell on Shopify, TikTok Shop, or any other leading marketplace, this is the change you want working for you.
What this blog will do next: We’ll unpack the details of these MCF partnerships, compare channel economics, and show you how we are turning this shift into a simple, repeatable workflow with UniCon. UniCon, our AI-Enabled Agentic Multichannel Solution, helps sellers list, optimize, and market products across Amazon, Walmart, TikTok Shop, SHEIN, Temu, eBay, and beyond; all while unifying orders, fulfillment, and performance insights in a single, prompt-driven dashboard.
Soon you’ll be able to pull listings from Amazon, publish them across marketplaces, and route fulfillment through MCF: all your needs catered to under ONE roof.
What changed — Amazon MCF is now built for more than just Amazon
For sellers managing storefronts across Shein, Walmart, Shopify, and beyond, Amazon has offered to make fulfillment a lot simpler. Now, even your orders on non-Amazon marketplaces can use the same inventory pool, fulfillment flow, and delivery promise, no matter where the sale happens.
Here’s how it works for each channel:
For SHEIN sellers
You’ll soon be able to fulfill Shein orders directly via Amazon MCF, using a new free app available in Seller Central, the Supply Chain by Amazon portal, and the Shein Seller Hub (by end of 2025).
This means: faster deliveries, synced tracking, and no need to manage a separate warehouse just for Shein.
For Walmart sellers
Amazon MCF now officially supports Walmart Marketplace orders.
So you can either:
- Manually create fulfillment requests inside Amazon Seller Central
- Or use an integration partner like CedCommerce to automate the entire flow
Every order fulfilled via MCF includes end-to-end tracking, unbranded packaging, and carrier flexibility, without risking account conflict on Walmart.
For Shopify merchants
If you’re part of the Shopify Fulfillment Network, you can now link your Amazon Seller Central account and select Amazon MCF as your preferred fulfillment partner. The Result: Shopify orders are picked, packed, and shipped using Amazon’s network — with minimal setup and Prime-level delivery speeds.
When Does Amazon MCF Make the Most Sense?
Amazon’s expanded multi-channel fulfillment partnerships aim to create a unified path that lets you centralize inventory, accelerate shipping, and reduce operational drag.
The Price Advantage
Here’s a quick side-by-side of what you can expect from these three fulfillment providers in 2025:
Amazon MCF vs Walmart WFS vs Shopify Fulfillment: 2025 Cost Comparison
| Scenario | Amazon MCF | Walmart WFS | Shopify Fulfillment Network |
|---|---|---|---|
| 1 small item (≤1 lb) | $6.99 | $3.45–$4.95 | ~$6.59 |
| 4+ units/order | $3.64/unit | No deep discount | Tiered discounts apply |
| Storage (Jan–Sep) | $0.78/cu ft | $0.75/cu ft | $2.25/cu ft (after 180 days) |
| Storage (Oct–Dec) | $2.40/cu ft | $1.50/cu ft (after 30 days) | Higher |
| Monthly program fee | $0 | $0 | $29 |
| Multi-channel support | Shopify, Walmart, TikTok, eBay | Walmart only | Shopify only |
| Branded packaging | Unbranded eligible | Walmart-branded | Standard |
| Returns | Included | Additional fees | Included |
Key Takeaways:
- Big savings on bulk orders: Amazon MCF drops per-item fulfillment cost to $3.64 for 4+ items. That is nearly 48% cheaper than its single-unit rate.
- No monthly fee, more flexibility: Unlike Shopify’s $29/month program fee, MCF is pay-as-you-go, especially attractive to seasonal or growth-stage brands.
- No marketplace commission on MCF orders: Sellers avoid Amazon’s typical 8–15% referral fee when using MCF for off-Amazon sales.
- Better multi-channel compatibility: Only MCF offers reliable support across Shopify, Walmart, TikTok Shop, and other non-Amazon storefronts from one inventory pool.
Where Walmart Could Be Considered
If you’re selling lightweight, single-SKU orders under 1 lb, Walmart’s WFS base rate of $3.45 can beat MCF’s flat $6.99 fee. However, this advantage narrows for multi-unit orders, larger items, or seasonal fulfillment.
Why Shein Isn’t in This Chart Yet
Shein doesn’t offer a traditional multi-channel fulfillment network. Their internal service (SFS) is invite-only for sellers with $5M+ in annual revenue, and operates on a flat 10% commission, not per-unit rates. For the majority of sellers, fulfillment will be handled manually; unless they use something like MCF via UniCon.
The Pros and Considerations
97%+ On-Time Delivery Performance
Same-day and next-day delivery with 97.2% on-time accuracy coverage now spans 93% of U.S. zip codes.
Source: Amazon Supply Chain Performance
Multi-Channel Fulfillment from One Inventory
Single Amazon MCF inventory fulfills orders from Shein, Walmart, Shopify, TikTok Shop, eBay, and more, reducing overstock risk, storage costs, and overselling errors.
Source: Amazon MCF Documentation
Unbranded Packaging Now Supported
Unbranded packaging for eligible orders, to meet channel (Shein and Walmart restrict Amazon packaging) compliance and improve buyer trust.
Source: Amazon Accelerate 2025 | Seller Central Updates
Unified SLAs & Automated Tracking
Fewer late shipment flags, better customer transparency, and lower ODRs with channel-agnostic SLAs (e.g., 1–3 day delivery) and API-generated tracking for Shein, Walmart, and Shopify orders.
Source: Amazon MCF Technical Overview
Lowest Fulfillment Cost for Multi-Unit Orders
Up to 48% cheaper when shipping 4+ units per order, as MCF reduces fulfillment to $3.64 per unit, compared to $6.99 for single orders.
Source: Feedonomics MCF Comparison
One Partner, Many Channels
Lower tech overhead, faster resolution, and unified logistics control, instead of dealing with multiple 3PLs or separate integrations. You can now use MCF + UniCon to:
- List products once (via Amazon)
- Sync to other platforms (Shein, TikTok Shop, Walmart)
- Fulfill orders automatically via MCF
Considerations to Keep in Mind
- No Branding Inserts or Custom Packaging
MCF doesn’t support branded packaging, inserts, or unboxing experiences. - Category Restrictions Exist
Some verticals (like perishables, oversized furniture, or sensitive SKUs) may not be eligible. Always verify item eligibility before syncing SKUs across channels. - SLA Mismatch Risk Across Platforms
While Amazon promises 1–3 day delivery, platforms like Shein (5–7 days) or TikTok Shop (7–10 days) may require custom cutoff settings. Sync shipping settings accordingly to prevent late flags.
While Amazon’s fulfillment expansion solves where your products ship from, it doesn’t solve listings, stock, pricing, and order syncing.
Let’s set you up for something built to handle that layer.
UniCon: New-Day Commerce Hub for a Multi-Channel World
When fulfilment speeds up, management has to keep up. That’s where UniCon can step up the game. It bridges the everyday work of listing, syncing, pricing, and tracking across marketplaces into one simple system.
One platform. Every channel. Total control.
UniCon isn’t another connector; it’s the command center for multichannel selling. A single source of truth for products, stock, orders, and fulfillment, built to scale effortlessly across your channels.
It unifies Amazon, Shein, TikTok Shop, Walmart, Shopify, and eBay into one operational layer that eliminates duplication, delays, and manual work.
Key Capabilities
Centralized Product & Listing Management
Map attributes once and reuse them everywhere. Manage titles, images, pricing, and SKUs for all marketplaces from a single dashboard.
Multi-Account & Multi-Channel Support
Scale faster without juggling logins or channels. Operate multiple Amazon and TikTok Shop accounts—and soon Shein, Walmart, Shopify, and eBay—from one control panel.
Warehouse & Inventory Control
View real-time stock by warehouse and fulfillment center. Prevent oversells, reallocate inventory automatically, and maintain SLA accuracy.
Automated Daily Operations
Zero-touch fulfillment accuracy with automated uploads, order processing, and MCF routing through the CedCommerce MCF Connector.
Role-Based Access Control
Secure collaborations by assigning permissions to staff, agencies, or fulfillment partners while safeguarding credentials.
Unified Reporting & Decision Making
Get a single source of truth across products, orders, and performance metrics. Analyze what’s selling, what’s pending, and what needs action; in real time.
In essence: UniCon takes what Amazon MCF can do, fast, reliable shipping, and completes the ecosystem with end-to-end control, visibility, and automation.
With UniCon as your multi-channel engine and Amazon MCF as your fulfillment backbone, operations finally scale as fast as sales do.
How You Can Use This Shift
From Amazon to Everywhere — In Minutes
A mid-sized apparel seller already using Amazon FBA wanted to expand to Shein and TikTok Shop before the holiday rush, but managing listings, stock, and shipping manually wasn’t scalable.
Here’s how they simplified it:
1. Product Import via UniCon
UniCon pulled their existing Amazon listings, SKUs, images, and inventory into one dashboard — no CSVs, no re-entry.
2. Cross-Marketplace Launch
The same listings went live on Shein and TikTok Shop in a few clicks, with stock synced across all channels.
3. Automated Fulfillment with MCF
When new orders arrived, Amazon MCF handled every shipment. Picking, packing, and delivering with 97%+ on-time performance. Tracking and delivery updates synced automatically back to UniCon.
4. One Dashboard, Total Visibility
Every order, channel, and tracking ID, visible in one view.
Result:
- One inventory powering all channels
- Zero manual uploads
- 2–3 day delivery speeds
- Fewer cancellations and happier customers
What once took days across tools now happens in minutes. A single, connected flow from Amazon → UniCon → Shein/TikTok Shop → Delivered.
Why This Matters Now
Fulfillment has quietly become the biggest competitive advantage in eCommerce. In 2025, 83% of online shoppers say fast, reliable delivery is the top factor influencing repeat purchases. That means the sellers who automate fulfillment and inventory control retain more customers.
With Amazon MCF now covering Shein, Walmart, and Shopify orders, and UniCon unifying listings and stock across all of them, you gain what most lack: real-time control over every order, every channel, and every warehouse.
This isn’t about keeping up; it’s about staying visible where customers are buying next. As fulfillment merges across channels, UniCon + MCF turns what was once fragmented and reactive into an always-on, revenue-driving system.
The Future of Multi-Channel Commerce
The next phase of commerce automation is already in motion. By Q1 2026, UniCon has the potential to evolve into an agent-first, AI-native platform capable of autonomously managing listings, inventory, pricing, and campaigns across marketplaces.
The long-term vision is simple but powerful: a single, intelligent infrastructure that connects every major marketplace to one operational backend. From Amazon to Shein, TikTok Shop to Walmart, UniCon aims to make selling everywhere feel as seamless as selling in one place.
One System for the New Commerce Era
The sellers who’ll win this next phase are those who connect their entire operation, like listings, inventory, and fulfillment into one ecosystem.
That’s where UniCon delivers the real edge. It bridges Amazon’s new Multi-Channel Fulfillment (MCF) capabilities with every other sales channel you use, giving you one dashboard, one inventory, and complete operational control.
Faster delivery. Fewer errors. Higher visibility. That’s how multi-channel selling is meant to work.
How You Can Use This Shift
From Amazon to Everywhere — In Minutes
A mid-sized apparel seller already using Amazon FBA wanted to expand to Shein and TikTok Shop before the holiday rush, but managing listings, stock, and shipping manually wasn’t scalable.
Here’s how they simplified it:
1. Product Import via UniCon
UniCon pulled their existing Amazon listings, SKUs, images, and inventory into one dashboard — no CSVs, no re-entry.
2. Cross-Marketplace Launch
The same listings went live on Shein and TikTok Shop in a few clicks, with stock synced across all channels.
3. Automated Fulfillment with MCF
When new orders arrived, Amazon MCF handled every shipment. Picking, packing, and delivering with 97%+ on-time performance. Tracking and delivery updates synced automatically back to UniCon.
4. One Dashboard, Total Visibility
Every order, channel, and tracking ID, visible in one view.
Result:
- One inventory powering all channels
- Zero manual uploads
- 2–3 day delivery speeds
- Fewer cancellations and happier customers
What once took days across tools now happens in minutes. A single, connected flow from Amazon → UniCon → Shein/TikTok Shop → Delivered.
Why This Matters Now
Fulfillment has quietly become the biggest competitive advantage in eCommerce. In 2025, 83% of online shoppers say fast, reliable delivery is the top factor influencing repeat purchases. That means the sellers who automate fulfillment and inventory control retain more customers.
With Amazon MCF now covering Shein, Walmart, and Shopify orders, and UniCon unifying listings and stock across all of them, you gain what most lack: real-time control over every order, every channel, and every warehouse.
This isn’t about keeping up; it’s about staying visible where customers are buying next. As fulfillment merges across channels, UniCon + MCF turns what was once fragmented and reactive into an always-on, revenue-driving system.
The Future of Multi-Channel Commerce
The next phase of commerce automation is already in motion. By Q1 2026, UniCon has the potential to evolve into an agent-first, AI-native platform capable of autonomously managing listings, inventory, pricing, and campaigns across marketplaces.
The long-term vision is simple but powerful: a single, intelligent infrastructure that connects every major marketplace to one operational backend. From Amazon to Shein, TikTok Shop to Walmart, UniCon aims to make selling everywhere feel as seamless as selling in one place.
One System for the New Commerce Era
The sellers who’ll win this next phase are those who connect their entire operation, like listings, inventory, and fulfillment into one ecosystem. That’s where UniCon delivers the real edge. It bridges Amazon’s new Multi-Channel Fulfillment (MCF) capabilities with every other sales channel you use, giving you one dashboard, one inventory, and complete operational control.
Faster delivery. Fewer errors. Higher visibility. That’s how multi-channel selling is meant to work.
TL;DR for Sellers on the Go
Amazon Multi-Channel Fulfillment (MCF) now officially supports orders from Shein, Walmart, and Shopify, with shared inventory, unified tracking, and the same Amazon-grade delivery SLAs. (Announced at Amazon Accelerate 2025.)
- Why it matters: Sellers can now extend Prime-level fulfillment—97%+ on-time, 2-day delivery speeds—to non-Amazon channels, improving conversion and customer retention across marketplaces.
- The opportunity: One inventory can now serve every storefront.
→ Fewer warehouse dependencies, automated routing through MCF, and consistent delivery visibility for customers. - The consideration: Fulfillment cost structures and packaging options vary by channel (e.g., Walmart WFS vs. MCF). Sellers must align listing, order syncing, pricing and eligibility before scaling.
- The solution: Use UniCon, CedCommerce’s unified commerce hub, to connect all marketplaces, sync inventory, and route every order through Amazon MCF from a single dashboard.
Why this matters for marketplace sellers like you
Shared inventory = fewer stockouts
→ Store once in Amazon, fulfill everywhere, including Shein, Walmart, and Shopify.
Prime-grade shipping without new warehouses
→ Same/next-day delivery options and full tracking now extend to non-Amazon channels.
Simplified ops across platforms
→ No more toggling between tools; you unify order routing, reduce delays, and streamline customer experience.
Seamless customer experience across channels
→ Amazon’s unbranded packaging and universal tracking mean customers get consistency, regardless of where they ordered.
Want to learn how the UniCon connector with MCF capabilities can streamline and optimize your fulfillment operations? Book a free 1:1 session with our experts by filling out the form HERE.
